[darkhorn]

This is very English alphabet centric view.

> only costs a single bit

What if the password includes İ. The swapcase would be i. And the again its swapcase would be İ. And swapcase of I is ı. And swapcase of ı is I. Right? Well, it should depend on what language you use. Or should it?

Also I think this was in Github; they ask uppercase and I enter Ğ and Github doesn't recognize it as uppercase letter.